21419698 has 8 divisors (see below), whose sum is σ = 33166080. Its totient is φ = 10364340.

The previous prime is 21419681. The next prime is 21419701. The reversal of 21419698 is 89691412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21419698² = 917606924822408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21419698.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172678 + ... + 172801.

It is an arithmetic number, because the mean of its divisors is an integer number (4145760).

Almost surely, 2^21419698 is an apocalyptic number.

21419698 is a deficient number, since it is larger than the sum of its proper divisors (11746382).

21419698 is a wasteful number, since it uses less digits than its factorization.

21419698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345512.

The product of its digits is 31104, while the sum is 40.

The square root of 21419698 is about 4628.1419597934. The cubic root of 21419698 is about 277.7182677969.

The spelling of 21419698 in words is "twenty-one million, four hundred nineteen thousand, six hundred ninety-eight".